PVT Measurements on 3-Cyanobenzyl 2,5-bis(4-n-octyloxybenzoyl- oxy)benzoate up to 250 MPa and 423 K
| العنوان: | PVT Measurements on 3-Cyanobenzyl 2,5-bis(4-n-octyloxybenzoyl- oxy)benzoate up to 250 MPa and 423 K |
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| المؤلفون: | M. Sandmann, W. Weissflog, Albert Würflinger |
| المصدر: | Zeitschrift für Naturforschung A. 55:823-827 |
| بيانات النشر: | Walter de Gruyter GmbH, 2000. |
| سنة النشر: | 2000 |
| مصطلحات موضوعية: | Phase transition, Materials science, High pressure, Analytical chemistry, General Physics and Astronomy, Physical and Theoretical Chemistry, Mathematical Physics |
| الوصف: | P, Vm , T data have been measured for the nematic and isotropic phases of 3-cyanobenzyl 2,5-bis (4-n-octyloxybenzoyloxy)benzoate between 273 and 423 K and up to 250 MPa. The volume changes accompanying the crystal -nematic and nematic -isotropic transitions have been determined. The cor-responding enthalpy changes have been calculated using the Clausius-Clapeyron equation. The p, V m , T data enable also to estimate the volume entropy for the nematic-isotropic transition. It is found that the configurational part of the transition entropy amounts to 80%, this portion being distinctly larger than found in previous studies for conventional rod-like liquid crystals. |
| تدمد: | 1865-7109 0932-0784 |
| DOI: | 10.1515/zna-2000-9-1012 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::125f0d7bee149755617c2793b431bab0 https://doi.org/10.1515/zna-2000-9-1012 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........125f0d7bee149755617c2793b431bab0 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18657109 09320784 |
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| DOI: | 10.1515/zna-2000-9-1012 |